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Food with nutrients
In order to be a good nutrients source, a food must give you at least 10 percent of the U.S. Recommend Daily allowance (RDA) of those nutrients in a selected serving size.

For example, the U.S. RDA for magnesium is 400 milligrams per day. A good food source would contain at least 400 milligrams – and for good weight control it should be relatively light in calories. The United States Department of Agriculture, Human Nutrition Information Service (HNIS) says most people can get all the nutrients they need from the food they eat – but it can take special attention to do so. The lists in this article contain some of the best source of nutrients according to HNIS.